CN102236193A - Transparent touch sensing and liquid crystal display co-structure system - Google Patents
Transparent touch sensing and liquid crystal display co-structure system Download PDFInfo
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- CN102236193A CN102236193A CN2010101691583A CN201010169158A CN102236193A CN 102236193 A CN102236193 A CN 102236193A CN 2010101691583 A CN2010101691583 A CN 2010101691583A CN 201010169158 A CN201010169158 A CN 201010169158A CN 102236193 A CN102236193 A CN 102236193A
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Abstract
The invention provides a transparent touch sensing and liquid crystal display co-structure system. An electrode with a display function can be used as a touch detector with a touch sensing function. A time multiplexing technology is adopted, compared with the liquid crystal display panel without the touch sensing function, the transparent touch sensing and liquid crystal display co-structure system does not require an additional process, and no additional process means that no additional light is absorbed and reflected.
Description
Technical field
The present invention supplies the system of structure to be used for liquid crystal display (LCD) panel relevant for a kind of transparent type touch-control sensing and liquid crystal display.Particularly utilize the show electrode of display panels to be used as the detecting electrode of capacitance touching control sensor.
Background technology
Contact panel has been widely used in the input module of many electronic products.Especially contact panel and display panels be combined in become in the multiple application popular.Generally speaking, the display panels with touch-control sensing function is to get in display panels with additional contact panel.With the United States Patent (USP) 6th, 538 of prior art as authorizing Ming-shen Sun of this technology, the 706B2 case, authorize people's such as Yong Ik Bang United States Patent (USP) the 7th, 557, the 869B2 case, authorize people's such as Yun Cheol Jeong United States Patent (USP) the 7th, 508, the 461B2 case.Additional contact panel means in display panels and adds the lastblock contact panel and be used as annex on display panels.Except increasing cost, this technology produces thickness and the weight that increases whole front panel, and causes the shortcoming of the absorption and the reflection of more light.
Aforementioned prior art is the resistor-type contact panel.At the resistor-type contact panel two-layer electrode is arranged.Multi-layered electrode causes extra light absorption and reflection and the performance of display panels will reduce in the contact panel.The technology that No. 200620013292.3 cases of Chinese patent ZL are used can solve aforesaid shortcoming.In this technology, the layer of transparent conducting film directly is plated on the top glass substrate of display panels is used as the touch detection electrode.This prior art is the capacitor type touch detection, and only needs one deck conducting film to replace the two-layer conducting film of resistor-type touch detection.
Though this prior art can reduce the thickness and the weight of display panels, nesa coating still can cause light to be absorbed and reflect, and manufacturing cost is higher than the traditional LC D panel of no touch-control detector.Preferably the touch detection electrode is embedded in the top glass substrate of display panels to avoid extra light absorption and reflection.
A kind of display panels and resistor-type the contact panel technology of structure altogether are disclosed in the United States Patent (USP) the 6th, 501 of authorizing people such as MikioKurihara, the 529B1 case.Its structure has two plate bases, first substrate and second substrate.Liquid crystal is injected between two plate bases.On each plate base, provide the show electrode of a show image and a touch detection electrode to supply the sensing touch location.The thickness of this structure decrease whole front panel and weight.In addition, the absorption of light and reflection also reduce.But the position of touch detection electrode is limited, because touch detection electrode and show electrode can not be overlapping.Another shortcoming is that the structure of show electrode is different with the structure of touch detection electrode, and manufacturing cost is higher.
Low-cost, frivolous and high-quality are very important in many contact panels and application that display panels combines.In order to obtain above-mentioned functions, method is to utilize show electrode to be used as the touch detection electrode preferably, and does not increase extra structure.
Fig. 1 does not have the sectional drawing of the liquid crystal indicator of touch detection function for tradition.Among Fig. 1, this device comprises two glass substrates: a slice upper substrate 11 and a slice infrabasal plate 12.Last show electrode 130,131,132,133 is plated on 11 times show electrodes 14 of upper substrate and then is plated on infrabasal plate 12.Show electrode forms a pixel (pixel or segment) with following show electrode 14 on each.One deck liquid crystal layer 15 injects between upper substrate 11 and the infrabasal plate 12.This display panels comprises polaroid (polarizer) 17 and upward polaroid 16 and backlight (back light) 18 down.
Among Fig. 1, cause the electric capacity between show electrode and following show electrode very big because the distance of 12 of upper substrate 11 and infrabasal plates is very for a short time.If directly utilize to go up show electrode directly as the touch detection electrode, the sensitivity meeting is very low and be difficult to obtain correct detecting.When carrying out Presentation Function, alternating voltage waveform must be added on two electrodes.If the same show electrode of going up is used as contact-controllable detector, the sensing of contact-controllable detector must be influenced by alternating voltage waveform.Be head it off, must between Presentation Function and touch controllable function, solve with timesharing (multiplexing) mode.
Summary of the invention
Purpose of the present invention is providing a kind of display panels that the touch-control sensing function is arranged.
An inferior purpose of the present invention is at the display panels that the touch-control sensing function is arranged of the display panels same process that a kind of and no touch-control sensing function are provided.
A further object of the present invention is providing a kind of display panels that the touch-control sensing function is arranged, and wherein contact-controllable detector can not cause the reflection of extra light absorption and light.
Another purpose of the present invention is providing a kind of display panels that the touch-control sensing function is arranged, and wherein Presentation Function is minimum to the interference of contact-controllable detector.
For reaching above-mentioned purpose, first viewpoint of the present invention is total to the system of structure in a kind of transparent type touch-control sensing of instruction and liquid crystal display, comprise a transparent type display panels and a control system, display panels comprises a slice upper substrate, a slice infrabasal plate, a top electrode array, a bottom electrode array, polaroid on one deck, polaroid under one deck, one deck liquid crystal, one deck backlight; Control system comprises a microprocessor, a display control circuit, a display driver circuit array, a touch control sensing circuit, the transmission grid array that corresponds to bottom electrode with this top electrode short circuit; Touch control sensing circuit is used for object sensing or points near electrode; Display control circuit and display driver circuit are used to carry out Presentation Function; Wherein improvements are: pair of electrodes, a bottom electrode that comprises top electrode of top electrode array and bottom electrode array be in order to showing a pixel at display panels, and also can be used for carrying out the touch-control sensing function with a pair of electrode; Presentation Function and touch-control sensing function are carried out by time sharing; When carrying out Presentation Function, top electrode and bottom electrode are connected to the waveform generator of display driver circuit by display control circuit; When carrying out touch controllable function, top electrode and bottom electrode are not connected with display control circuit; The top electrode of pair of electrodes and bottom electrode are by short circuit and its function is single touch-control sensing electrode; The electric capacity of top electrode and bottom electrode is by short circuit and the sensitivity of touch detection function is not had load effect; When operation touch-control sensing function, top electrode and bottom electrode are not connected with the waveform generator of display driver circuit, do not disturb so display driver circuit can not form the touch-control sensing function; The present invention need not increase technology and not increase light absorption and light reflection because of adding the touch-control sensing function.
Another viewpoint of the present invention is being instructed a kind of transparent type touch-control sensing and the liquid crystal display system of structure altogether, and wherein display panels comprises: a slice upper substrate, a slice infrabasal plate, a top electrode array, a bottom electrode array, polaroid on one deck, one deck liquid crystal, one deck reflection horizon.
Another viewpoint of the present invention is in instruction a kind of touch-control sensing and the liquid crystal display system of structure altogether, and wherein display panels is the hybrid type liquid crystal display panel, and just, show electrode is formed by having touch controllable function and not having two kinds of show electrodes of touch-control.Shared bottom electrode can be used in zone at no touch-control sensing function, uses electrode pair (electrode pair) in the zone that the touch-control sensing function is arranged.
Description of drawings
Fig. 1 does not have the sectional drawing of the liquid crystal indicator (LCD) of touch detection function for tradition.
Fig. 2 is for can be used for the sectional drawing of Clairvoyant type liquid crystal indicator of the present invention (LCD).
Fig. 3 is for can be used for the sectional drawing of reflection-type liquid-crystal display device of the present invention (LCD).
Fig. 4 is that a photosites is added on the curve map of the waveform of upper and lower electrode to the time when " ON " state.
Fig. 5 is that a photosites is added on the curve map of the waveform of upper and lower electrode to the time when " OFF " state.
When Fig. 6 was presented at " OFF " state, non-vanishing voltage was added on top electrode and bottom electrode when showing time T 1.
Fig. 7 is for showing the circuit diagram of the technology of the present invention.
Fig. 8 shows the square circuit diagram of touch control sensing circuit.
Fig. 9 shows the sectional drawing in conjunction with the mixed type display device (LCD) of traditional display panel and display panel of the present invention.
Symbol description
7 liquid crystal display systemss, 11 upper substrates
14 times show electrodes of 12 infrabasal plates
Polaroid on 15 liquid crystal 16
17 times polaroid 18 backlight
21 upper substrates, 22 infrabasal plates
Polaroid on 25 liquid crystal 26
27 times polaroid 28 backlight
38 reflecting plates 41 are added on the voltage of top electrode
42 voltages 43 that are added on bottom electrode are added on upper and lower interelectrode voltage
51 voltages 52 that are added on top electrode are added on the voltage of bottom electrode
53 are added on the voltage that upper and lower interelectrode voltage 61 is added on top electrode
62 voltages 63 that are added on bottom electrode are added on upper and lower interelectrode voltage
71 microprocessors, 72 display control circuits
73 touch control sensing circuits 80 are shared bottom electrode
81,82,83,84 top electrodes, 85,86,87,88 top electrodes
95, show electrode on 96,97,98 bottom electrodes 130,131,132,133
230, show electrode array on 231,232,23
240,241,242,243 times show electrode arrays
740-74N display driver circuit array 750-75N transmission grid array
760-76N bottom electrode array 770-77N top electrode array
801 inputs, 803 sensing oscillators
804 counters, 805 system's oscillators
806 microprocessors, 807 power regulators
Embodiment
Reaching other purpose and advantage more than of the present invention can easilier with reference to the explanation of following reference diagram and most preferred embodiment understand fully.
Fig. 2 is for can be used for transparent type liquid crystal display of the present invention (LCD) panel.The display panels that Fig. 2 describes has two plate bases: upper substrate 21 and infrabasal plate 22.Inject one deck liquid crystal 25 between two plate bases.Going up show electrode array 230,231,232 and 233 for one is plated on the upper substrate 21.A following show electrode array 240,241,242 and 243 is plated on the infrabasal plate 22.One of last show electrode array 230 and corresponding show electrode array 240 down are in order to show a pixel (Pixel) of display panels.On upper substrate 21, polaroid 26 on one deck is arranged, on infrabasal plate 22, polaroid 27 under one deck is arranged.One deck backlight 28 is under following polaroid 27.
Fig. 3 shows (LCD) panel for can be used for reflective liquid crystal of the present invention.The structure of reflective liquid crystal display panel is similar to the transparent type display panels.But the reflective liquid crystal display panel does not descend polaroid, and backlight is replaced by reflecting plate 38.The present invention can be applicable to reflection-type and transparent type display panels and need not the correction of circuit.
Purpose of the present invention is being made for the electrode of Presentation Function and the electrode of touch controllable function with identical electrode.For reaching above-mentioned purpose, can between the electrode of the electrode of Presentation Function and touch controllable function, use timesharing (timemultiplexing) technology.
The time sharing that uses between the electrode of Presentation Function and the electrode of touch controllable function can be used the waveform explanation of Fig. 4.Be plotted in the waveform 41,42, and 43 corresponding of Fig. 4 with the electrode of Fig. 2 and Fig. 3.Waveform 41 is for being added on the voltage of top electrode, and waveform 42 is for being added on the voltage of bottom electrode, and waveform 43 is for being added on the relative voltage of top electrode and bottom electrode.
As shown in Figure 4, two kinds of time interval T1 and T2 are arranged.When time T 1, system carries out Presentation Function.And when time T 2, system carries out touch controllable function.
When time T 1, top electrode and bottom electrode are connected in the LCD display driver circuit.During interbody spacer, can not carry out the touch-control measuring program, at this moment because the interference of display waveform will cause the touch detection mistake.
When time T 2, system will carry out the touch-control circuit function, and top electrode and bottom electrode will be used as contact-controllable detector.Disturb for fear of the waveform from display circuit, top electrode and bottom electrode must cut off from display driver circuit.All top electrodes and bottom electrode all are connected to the touch detection circuit.In addition, when time T 2, each top electrode forms short circuit with corresponding bottom electrode, at this moment between this two electrode identical voltage is arranged, as the waveform 41 and 42 of Fig. 4.Among Fig. 4, coupling is shown as square wave from the waveform of touch detection circuit at this when time T 2, but also can be other waveform, decides on used touch detection circuit.No matter when time T 2 voltage waveform of coupling, bottom electrode supreme from the touch detection circuit why, upper and lower interelectrode voltage is zero, shown in the waveform 43 of Fig. 4.And coupling can not influence the display quality of LCD from the waveform of touch detection circuit.Though between top electrode and corresponding bottom electrode big electric capacity is arranged, upper and lower electrode is as short circuit, and upper and lower electrode when time T 2 its function just like an electrode.This electric capacity is zero to the load of touch detection electricity, does not also influence the sensitivity of touch detection circuit.
For display panels, no matter at " ON " or " OFF " state, the alternating voltage that to be added on two voltages between show electrode must be no any flip-flop.
The waveform that is shown in Fig. 4 be used to illustrate a photosites when " ON " state to the curve map of time.Waveform 43 is for being added on upper and lower interelectrode voltage.This voltage is the alternating voltage of no flip-flop.
For showing a photosites at " OFF " state, it is little good in specific mass to obtain that the relative voltage value between upper and lower show electrode is wanted.Simple solution is for adding no-voltage in upper and lower electrode when showing time T 1.This waveform is shown in Fig. 5.Waveform 51 is for being added on the voltage of top electrode among Fig. 5, and waveform 52 is the voltage that is added on bottom electrode, and waveform 53 is for being added on upper and lower interelectrode voltage.By the waveform 53 of Fig. 5 as seen, being added on upper and lower interelectrode relative voltage is zero.So the demonstration of " ON " or " OFF " state contrast is very good.
At " OFF " state, when showing time T 1, be added on upper and lower interelectrode voltage and needn't be no-voltage.In Fig. 6, a non-vanishing voltage is added on top electrode and bottom electrode when showing time T 1.Because two electrodes have the same waveform, two interelectrode voltages are zero, shown in the waveform 63 of Fig. 6.
The present invention during touch detection, top electrode must with the bottom electrode short circuit, top electrode can not be shared a shared bottom electrode as traditional LC D.This is configured in Fig. 2 and Fig. 3 is described in detail.
Fig. 7 is for showing the circuit diagram of the technology of the present invention.Among Fig. 7, the liquid crystal display systems 7 with contact-controllable detector comprises microprocessor 71, display control circuit 72, touch control sensing circuit 73, display driver circuit array 740 are to 74N, and transmission gate array 750 is to 75N, top electrode array 770 is to 77N, and bottom electrode array 760 is to 76N.The electrode pair that comprises top electrode and bottom electrode can be with also can be used for sensing finger or object near this electrode to be made for Presentation Function.To playing the part of above-mentioned two kinds of functions, can use time sharing with unitary electrode.Microprocessor 71 produces signal to carry out the timesharing order between two kinds of functions.Display control circuit 72 produces controlling signal and gives display driver circuit.Display driver circuit in order to drive electrode to carrying out Presentation Function.Touch control sensing circuit 73 in order to sensing finger or object near this electrode.During showing time T 1, electrode 760 and 770 is controlled to be connected to the waveform generator of display driver circuit 740 by display control circuit 72.Transmission lock 750 is opened circuit (OFF) and the input bias voltage of touch control sensing circuit 73 floats.Under this state, electrode only is subjected to the influence of display control circuit and is not subjected to the influence of touch control sensing circuit.
During touch-control sensing time T 2, electrode 760 and 770 function are the waveform generator that touch detection is free of attachment to display driver circuit 740.At this moment, transmission lock 750 is connected (ON) and is made electrode 760 and 770 short circuits.The function of two electrodes just like an electrode and two interelectrode electric capacity to the not influence of running of touch detection function.Because display driver circuit is free of attachment to electrode and two interelectrode electric capacity do not influence touch detection, circuit 7 can normally be carried out touch detection work.
Disclosed document has many kinds of condenser type objects near detector.Most of condenser type objects all can be used as touch control sensing circuit of the present invention near detector.Authorize the United States Patent (USP) the 7th of Lin Xude (the present inventor), 023,221B1 case, No. 259908 cases of TaiWan, China patent I, the patent 1791260B1 of European Union case, No. 200510080231.9 cases of the patent ZL of the People's Republic of China (PRC) and No. 4365817 case of Jap.P. be a kind of condenser type object near detector, also can be used as touch control sensing circuit of the present invention.In the present invention, only need N detector of row in touch control sensing circuit, this touch control sensing circuit is shown in Fig. 8.The running of this circuit is specified in United States Patent (USP) the 7th, 023, the 221B1 case, and 801 are input, and 803 is oscillator, and 804 is counter, and 805 is system oscillator, and 806 is microprocessor, and 807 is power regulator.At this, will more at large explain orally the running of touch control sensing circuit and the running between the LCD Presentation Function.When the circuit of Fig. 8 is used to Fig. 7 when being used as touch control sensing circuit 73,, the running of touch control sensing circuit is controlled by the microprocessor 71 of Fig. 7.The microprocessor 806 of Fig. 8 can be combined into a microprocessor with the microprocessor 71 of Fig. 7.Otherwise microprocessor 806 must be synchronoused working with microprocessor 71, synchronouss working with the LCD Presentation Function to guarantee the touch-control sensing function.As shown in Figure 7, electrode 760,761 to 76N is connected to input I0, the I1 to IN of touch control sensing circuit respectively.During touch-control sensing time T 2, all electrodes are transmitted grid CNTC0, CNTC1 to CNTCN in regular turn and scan, as shown in Figure 8.During LCD shows time T 1, the input of touch control sensing circuit will be cut off from show electrode by transmission grid CNTC0, CNTC1 to the CNTCN open circuit of Fig. 8.And the bias circuit in the oscillator 803 in Fig. 8 is with the unlikely running that influences the LCD display circuit.
By the description of the technology of the present invention, unique structure that is not both bottom electrode of display panel of the present invention and traditional display panel.The technology of the present invention does not have different with the technology of conventional art.The manufacturing of display panels of the present invention does not increase cost.Compare with traditional display panel simultaneously, display panel of the present invention does not have the coating of increase.The coating that display panel does not have increase means absorption and the reflection that does not increase light.
Using same technology, is that mixed type is feasible in conjunction with traditional display panel and display panel of the present invention.This mixed type display panel can be made in conjunction with the structure of Fig. 1 and Fig. 2, as shown in Figure 9.Among Fig. 9, top electrode 85,86,87,88 and bottom electrode 95,96,97,98 are played the part of and are shown and the touch-control dual-use function.Top electrode 81,82,83,84 and shared bottom electrode 80 only can be used as show electrode.
By the detailed description of above preferable specific embodiment, be to wish know more the feature of describing this creation, and be not to come category of the present invention is limited with above-mentioned disclosed preferred embodiments with spiritual.Opposite, its objective is that hope can contain being arranged within the protection domain that claim of the present invention defines of various changes and tool equality.
Claims (3)
1. transparent type touch-control sensing and the liquid crystal display system of structure altogether, it is characterized in that, comprise a transparent type display panels and a control system, this display panels comprises a slice upper substrate, a slice infrabasal plate, go up the show electrode array for one, a following show electrode array, polaroid on one deck, polaroid under one deck, between the injection of one deck liquid crystal and this upper substrate and the infrabasal plate, one deck backlight; This control system comprises a microprocessor, a display control circuit, and a display driver circuit array, a touch control sensing circuit, one with the transmission grid array of this top electrode with corresponding bottom electrode short circuit; This touch control sensing circuit is used for object sensing or points near this electrode; This display control circuit and this display driver circuit are used to carry out Presentation Function; Wherein improvements comprise at least:
Pair of electrodes, a bottom electrode that comprises a top electrode of show electrode array on this and this time show electrode array be in order to showing a pixel at this display panels, and also be used to carry out the touch-control sensing function with a pair of electrode;
This Presentation Function and this touch-control sensing function are fulfiled two kinds of functions by time sharing: Presentation Function and touch controllable function;
When carrying out Presentation Function, this top electrode and this bottom electrode are connected to the waveform generator of this display driver circuit by this display control circuit;
When carrying out touch controllable function, this top electrode and this bottom electrode are not connected with display driver circuit; The top electrode of this pair of electrodes and this bottom electrode are by short circuit and its function is single touch-control sensing electrode; The electric capacity of this top electrode and this bottom electrode is by short circuit and the sensitivity of this touch detection function is not had load effect;
When this touch-control sensing function of operation, this top electrode and this bottom electrode are not connected with the waveform generator of this display driver circuit, and this display driver circuit will not form interference to this touch-control sensing function.
2. touch-control sensing according to claim 1 and liquid crystal display be the system of structure altogether, it is characterized in that this display panels comprises: a slice upper substrate, a slice infrabasal plate is gone up show electrode array, a following show electrode array for one, polaroid on one deck, one deck liquid crystal, one deck reflection horizon.
3. touch-control sensing according to claim 1 and 2 and liquid crystal display be the system of structure altogether, it is characterized in that, this display panels is the hybrid type liquid crystal display panel, and shared bottom electrode is used to not have the zone of touch-control sensing function, and electrode pair is used to have the zone of touch-control sensing function.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760405A (en) * | 2012-07-11 | 2012-10-31 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
| CN105117063A (en) * | 2015-08-31 | 2015-12-02 | 联想(北京)有限公司 | Information processing method and electronic equipment |
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| US6501529B1 (en) * | 1999-08-18 | 2002-12-31 | International Business Machines Corporation | Liquid crystal display element integrated with a touch sensor |
| CN1940840A (en) * | 2005-09-26 | 2007-04-04 | 深圳市联思精密机器有限公司 | Optical-touched screen |
| JP2009282501A (en) * | 2008-05-22 | 2009-12-03 | Samsung Electronics Co Ltd | Touch sensor, liquid crystal display panel having the same and sensing method of touch sensor |
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2010
- 2010-04-28 CN CN 201010169158 patent/CN102236193B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6501529B1 (en) * | 1999-08-18 | 2002-12-31 | International Business Machines Corporation | Liquid crystal display element integrated with a touch sensor |
| CN1940840A (en) * | 2005-09-26 | 2007-04-04 | 深圳市联思精密机器有限公司 | Optical-touched screen |
| JP2009282501A (en) * | 2008-05-22 | 2009-12-03 | Samsung Electronics Co Ltd | Touch sensor, liquid crystal display panel having the same and sensing method of touch sensor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760405A (en) * | 2012-07-11 | 2012-10-31 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
| WO2014008681A1 (en) * | 2012-07-11 | 2014-01-16 | 深圳市华星光电技术有限公司 | Display device and image displaying and touch sensing method thereof |
| CN102760405B (en) * | 2012-07-11 | 2015-01-21 | 深圳市华星光电技术有限公司 | Display device and imaging displaying and touch sensing method thereof |
| CN105117063A (en) * | 2015-08-31 | 2015-12-02 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| US10318064B2 (en) | 2015-08-31 | 2019-06-11 | Beijing Lenovo Software Ltd. | Information processing method and electronic device |
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| CN102236193B (en) | 2013-04-17 |
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